Patent US3820364A successfully refreshed from Google Patents.
US3820364A
Expired / Lapsed
US
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Bar device for keyed locks
Assignee: Individual
•
Filing: 1973-03-23
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Granted: 1974-06-28
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Expires: 1993-03-23
Abstract
Abstract A manually operated bar available only at the inside of a cylinder lock prevents entry of a key.
Inventors
- 👤 M Greeley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:35
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/14; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7932; Y10T70/7944; Y10T70/7955
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
In cylinder locks, a key blocking means consisting of a member slideably retained in a channel perpendicular to a key opening, a slot passing through a stationary part of said lock into a rotating part of said lock and passed a key space, accepting slideably a member conforming in cross section to said slot, so that withdrawal of said member clears said key space and rotating part and full insertion prevents both complete insertion of a key and rotation of said moveable part.
Claim 2
Dependent Claim
83 words
In cylinder locks, a key blocking means consisting of a member slideably retained in a channel perpendicular to a key opening, a slot passing through a stationary part of said lock into a rotating part of said lock and passed a key space, accepting slideably a member conforming in cross section to said slot, so that withdrawal of said member clears said key space and rotating part and full insertion prevents both complete insertion of a key and rotation of said moveable part.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |